Electric large-angle flattening method for seat backrest

Abstract

The application provides a seat backrest electric large-angle flattening method, which comprises the following steps: step 1: driving the seat backrest through an electric angle adjuster to realize bidirectional electric rotation of the seat backrest by 96 degrees forward and 33 degrees backward, and to realize a total swing angle of 129 degrees; and step 2: configuring an independent electric cushion forward extension mechanism on the seat, and driving the cushion to electrically extend along the front-back direction through the electric cushion forward extension mechanism in the movement process of the large-angle flattening of the seat backrest to dynamically change the spatial position of the cushion relative to the seat backrest; wherein the forward movement of the cushion releases the movement space required by the rotation of the backrest, eliminates the interference among the backrest, the cushion and the armrest, and makes the backrest complete the full 129-degree flattening stroke; meanwhile, the posture of the cushion is adjusted, the thigh supporting position of a human body in the large-angle flattening state is compensated, a reasonable man-machine posture is maintained, and the thighs are prevented from being suspended; the application has the advantage that the 129-degree large-angle full-stroke electric flattening control is realized.

Description

Technical Field

[0001] This invention relates to the field of automotive seat technology, specifically to a method for electrically reclining a seat back at a large angle. Background Technology

[0002] Single chairs with armrests typically include a seat cushion, backrest, and armrests. The backrest can rotate relative to the seat cushion around a pivot point, allowing the chair to switch between sitting and reclining positions to meet the user's rest needs. However, the current ability of single chairs with armrests to recline completely flat is limited, and it is still difficult to achieve a full 129° electric reclining angle. The main problems are as follows: 1. Interference issues exist when the backrest is laid flat at a large angle. When the backrest rotates at a large angle, if the seat cushion remains fixed, the backrest will interfere with the seat cushion, armrests, and surrounding interior trim, causing the backrest rotation to be obstructed and unable to continue laying flat, and may even cause collision damage to components. Due to this limitation, the backrest laying angle of existing seats is usually small, making it difficult to achieve a large-angle, full-travel flat position.

[0003] 2. Insufficient electrification throughout the entire adjustment range. In the current seats, some of the adjustment range from sitting position to fully reclined still relies on manual mechanisms. Under large-angle adjustment conditions, manual adjustment requires a large torque and is laborious, making it difficult for users to easily adjust the seat to a reclined position.

[0004] 3. Poor compatibility with reclining posture. When the backrest is reclined at a large angle, the seat cushion posture remains basically unchanged and cannot be adjusted synchronously with the backrest posture. This results in the thighs lacking effective support, and when the seat is laid flat, the thighs are suspended in the air, leading to an unbalanced sitting posture and a poor reclining experience.

[0005] Therefore, how to achieve a large-angle reclining of the backrest while avoiding rotational interference, realizing full-stroke electric drive, and ensuring the comfort and consistency of the seating posture after reclining are technical problems that urgently need to be solved in this field. Summary of the Invention

[0006] In view of the above problems, the purpose of this invention is to provide a method for electrically reclining a seat back at a large angle, achieving 129° large angle full-stroke electric reclining control, so as to overcome the above problems.

[0007] The present invention provides a method for electrically reclining a seat back at a large angle, comprising the following steps: Step 1: Drive the seat back using the electric angle adjuster to achieve bidirectional electric rotation of the seat back 96° forward and 33° backward, for a total swing angle of 129°. Step 2: Addressing the issue in existing technology where, when the seat back rotates to a large-angle flat position, if the seat cushion is fixed, the lower part of the seat back interferes with the seat cushion and armrests, causing a shift in the thigh support position and affecting ergonomic support, an independent electric seat cushion extension mechanism is configured. During the large-angle flat position of the seat back, this mechanism drives the seat cushion to extend electrically in the front-back direction, dynamically changing the spatial position of the seat cushion relative to the seat back. The forward movement of the seat cushion releases the space required for the backrest rotation, eliminating interference between the backrest, seat cushion, and armrests, allowing the backrest to complete its full 129° flat position. Simultaneously, the seat cushion posture is adjusted to compensate for the thigh support position during the large-angle flat position, maintaining a reasonable ergonomic posture and preventing the thighs from dangling.

[0008] As a preferred embodiment of the present invention, the electric angle adjuster controls the tilt adjustment of the seat back, and the electric seat cushion extension mechanism controls the forward extension adjustment of the seat cushion. Since both the electric angle adjuster and the electric seat cushion extension mechanism are driven by motors and can be independently controlled electrically, no manual intervention is required for the entire adjustment stroke. Through motion envelope verification, it is ensured that the armrest does not interfere with the moving parts under all extreme working conditions, realizing full-stroke electric large-angle flattening in the armrest state.

[0009] The advantages and positive effects of this invention are: 1. The control method of the present invention enables the seat cushion to extend forward electrically in sync with the backrest as it reclines at a large angle, effectively compensating for the thigh support position, preventing the thighs from dangling and the body from slipping in a lying position, maintaining a reasonable human-machine posture, and improving the riding comfort in a lying position.

[0010] 2. The backrest tilt and seat cushion extension of this invention are all electrically driven, with no manual operation required. The adjustment torque is stable, the operation is effortless, and the posture switching is simple, which improves the convenience of product use and the overall quality of the vehicle.

[0011] 3. The present invention achieves a large-angle flattening without removing the original armrest configuration, without sacrificing storage and auxiliary support functions by eliminating the armrests, thus balancing the practical value of the armrests and the reclining function of the seat, resulting in a more complete product configuration. Attached Figure Description

[0012] Figure 1 This is a schematic diagram illustrating the process of designing the seat backrest of the present invention, from the 33° posture position to the 96° posture position.

[0013] Figure 2 This is a schematic diagram of the seat back flipping backward according to the present invention.

[0014] Figure 3 This is a schematic diagram of the seat back of the present invention standing upright.

[0015] Figure 4This is a schematic diagram of the seat of the present invention flipping forward and the seat cushion extending forward.

[0016] Figure 5 This is a schematic diagram of the seat of the present invention flipping forward and flattening. Detailed Implementation

[0017] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form for ease of description of one or more embodiments.

[0018] See Figure 1-5 This embodiment of a method for electrically reclining a seat back at a large angle includes the following steps: Step 1: Drive the seat back using the electric angle adjuster to achieve bidirectional electric rotation of the seat back 96° forward and 33° backward, for a total swing angle of 129°. Step 2: Addressing the issue in existing technology where, when the seat back rotates to a large-angle flat position, if the seat cushion is fixed, the lower part of the seat back interferes with the seat cushion and armrests, causing a shift in the thigh support position and affecting ergonomic support, an independent electric seat cushion extension mechanism is configured. During the large-angle flat position of the seat back, this mechanism drives the seat cushion to extend electrically in the front-back direction, dynamically changing the spatial position of the seat cushion relative to the seat back. The forward movement of the seat cushion releases the space required for the backrest rotation, eliminating interference between the backrest, seat cushion, and armrests, allowing the backrest to complete its full 129° flat position. Simultaneously, the seat cushion posture is adjusted to compensate for the thigh support position during the large-angle flat position, maintaining a reasonable ergonomic posture and preventing the thighs from dangling.

[0019] In this embodiment, the electric angle adjuster controls the tilt adjustment of the seat back, and the electric seat cushion extension mechanism controls the forward extension adjustment of the seat cushion. Since both the electric angle adjuster and the electric seat cushion extension mechanism are driven by motors and can be independently controlled electrically, no manual intervention is required for the entire adjustment stroke. Through motion envelope verification, it is ensured that the armrest does not interfere with the moving parts under all extreme working conditions, realizing full-stroke electric large-angle flattening in the armrest state.

[0020] The electric seat cushion extension mechanism in this embodiment includes: two sets of rotating support arms located below the seat cushion, and a motor that drives the two sets of rotating support arms. The motor drives the two sets of rotating support arms to move the seat cushion forward or backward in the horizontal direction, providing the backrest with the space required to flip and flatten.

[0021] The electric seat cushion forward extension mechanism can also adopt patent number 202520669837.9, patent name is a zero-gravity seat with a backrest that can be laid flat forward; or adopt patent number 202422550663.2, patent name is a seat cushion lifting mechanism for a car seat with a rear seat folding mechanism; or adopt patent number 202411437625.4, patent name is a seat with a backrest that can be laid flat and a seat cushion that can be laid flat.

[0022] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for electrically reclining a seat back at a large angle, characterized in that, Includes the following steps: Step 1: Drive the seat back using the electric angle adjuster to achieve bidirectional electric rotation of the seat back 96° forward and 33° backward, for a total swing angle of 129°. Step 2: Install an independent electric seat cushion extension mechanism on the seat. During the large-angle reclining movement of the seat back, the electric seat cushion extension mechanism drives the seat cushion to extend electrically in the front-back direction, dynamically changing the spatial position of the seat cushion relative to the seat back. Among them, the forward movement of the seat cushion releases the movement space required for the backrest to rotate, eliminating interference between the backrest, seat cushion, and armrests, allowing the backrest to complete the full 129° reclining stroke. At the same time, the seat cushion posture is adjusted to compensate for the thigh support position when the seat is reclined at a large angle, maintaining a reasonable human-machine posture and preventing the thighs from dangling.

2. The method for electrically reclining a seat back at a large angle according to claim 1, characterized in that, The electric angle adjuster controls the tilt adjustment of the seat back, and the electric seat cushion extension mechanism controls the forward extension adjustment of the seat cushion. Since both the electric angle adjuster and the electric seat cushion extension mechanism are driven by motors and can be independently controlled electrically, no manual intervention is required for the entire adjustment range. Through motion envelope verification, it is ensured that the armrests do not interfere with moving parts under all extreme working conditions, achieving full-range electric flattening with the armrests on.

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